Júlio Afrânio Peixoto (born December 17 1876 in Lençóis – January 12, 1947) was a Brazilian physician, writer, politician, historian, university president, and pioneering eugenicist. He held many public offices, including Brazilian congressional representative from Bahia in the federal Câmara de Deputados (federal congressman) (1924–1930), first the president of the Universidade Federal do Rio de Janeiro, member of the Brazilian Cultural Center in the United States, president of the Academia Brasileira de Letras, and honorary doctorates from Coimbra University and the University of Lisbon, Portugal.